Fourloop.

About Fourloop

A small team with staff-level depth.

Founded in 2014, Fourloop Solutions, LLC is a software contracting firm run by engineers who have led teams and architected systems at the largest scale in the industry. No layers, no handoffs. You work directly with the people writing the code.

The Team

Three engineers. Decades of scale.

Between us we've shipped checkout flows at PayPal, advertising platforms at GoodRx, banking APIs at Ally, and 0→1 products for venture-backed startups.

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Rene Osman

Engineering Manager · Distributed Systems

10+ years leading high-scale platforms at PayPal: checkout orchestration and messaging systems operating at billions of requests per day. Led a Node.js-to-Go migration saving millions in infrastructure costs, and helped deploy some of PayPal's first Go APIs. Specialist in Go, GraphQL federation, and performance at scale.

  • Go
  • GraphQL
  • Node.js
  • AWS
  • System Design
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Ameno Osman

Lead Engineer · AI & Full-Stack

13+ years as IC, tech lead, engineering manager, and founding engineer. Sole engineer of a production fintech platform handling hundreds of thousands of transactions, and designer of AI-native agentic workflows that run planning through deployment. Strong mentor and communicator. Fluent in English, French & Arabic.

  • TypeScript
  • C#/.NET
  • NestJS
  • PostgreSQL
  • LLM / MCP
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Raouf Osman

Senior Engineer · Co-Founder

10+ years delivering web, mobile, and cloud systems across fintech, healthcare, IoT, and government. Co-founded Fourloop and built its client network from the first contract. Full-cycle delivery from requirements to production on AWS, Azure, and GCP, with a 95%+ repeat-engagement rate.

  • .NET
  • Node.js
  • React / Vue
  • Terraform
  • Multi-cloud

Teams we've built and shipped for

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